Measure 10 grams of NaCl and add this to a beaker of 100 ml water. a. Stir the salt with a spoon to dissolve. Record how long it takes to dissolve all of the salt.

Ionic compounds are made of ions, and yet the overall charge of an ionic compound is neutral. why?

In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?